Pipe-wrench.



n 651,220. mum .5-,- I900;

A. w. WABNOCK.

PIPE WRENCH.

(Applicatipn filed Sept. 23; 1899.) (N o M o d a I WITIJEEEEEI wam/ 4UNITED STATES PATENT CFFICE.

AMOS w. WARNOOK, or BOSTON, MASSACHUSETTS.

"PIPE-WRENCH.

{SPECIFICATION forming part or Letters Patent No. 651,220, dated June 5,1906.

Application filed September 23, 1899. semi No. 731,409. (No model.)

To all whom it may concern.-

Be it known that I, AMos W. WARNOOK, a citizen of the United States,residing at Boston, in the county of Suffolk and State of Massachusetts,have invented a new and useful Improvement in Pipe-Wren ches, of whichthe following is a specification.

This invention relates to an improved wrench adapted particularly forgrasping or handling metal or other pipe having a smooth orhighly-polished or plated surface; and it relates to that class ofpipe-wrenches in which a strap, preferably of fabric, is employed, suchstrap being formed into a loop for the purpose of engaging a pipe.

The two principal objects of my invention are to provide a pipewrenchwhich will be absolutely efficient for the purpose for which it isconstructed and to construct a pipewrench with the greatest simplicityand the least possible number of parts, the parts or pieces aside fromthe strap which constitute my wrench being only threeviz., the frame orhandle, a shackle, and a pivot-pin, whereby the shackle is connectedwith the frame.

The nature of the invention in detail is fully described below, andillustrated in the accompanying drawings, in which- Figure 1 is a planView showing my wrench engaging a pipe. Fig. 2 is a side elevation ofthe same.

Similar letters of reference indicate corresponding parts.

A represents the frame or handle, formed with the integral head B. Thishead is turned up at substantially the forward angle shown at Bsayforty-five degrees and its extreme end or nose B" is rounded andsomewhat diminished in thickness, as shown in Fig. 2. The rear portionof the head is horizontally bored to receive a pivot-pin C, by means ofwhich a shackle D is pivotally secured to the frame, said shackleextending up from the 7 head behind the portion B and slightly above theupper end of said portion. The strap E is formed with a loop E, theportion E of which is preferably cemented or otherwise secured to themain body of the strap, such loop being for the purpose of attaching itto the shackle.

In operation the end a of the strap is passed around and under the pipeS and thence over the nose B of the head and back through the shacklealong the upper surface of the frame. The wrench takes its position onor with relation to the pipe by lifting the handle and grips the pipeand turns it by depressing the handle. When the handle is depressed, thenose B" forces the portion e of the strap against the loop, thus lockingthe strap between the nose and that part of the loop which is next theshackle, holding the adjustment where it is set, so that almost theentire circumference of the pipe is grasped by the strap. In otherwords, the head B B B almost completes the circle when gripping thepipe. The angle of the head and its length with relation to that of theshackle have been determined after much experiment and are such thatwhen the frame or handle is horizontal the shackle extends up somewhatabove the end of the nose and at nearly or quite the same angle as thehead. Moreover, the length of the upturned head in connection with itsangle enables the operator to readjust the position of the strap on thepipe without losing the bearing.

As will be readily understood, the adjustment is easy, the wrench willnot mar a polished pipe, and the device can be applied to a pipe in alimited space-as in the corner of a room, for example.

The economy of construction can be appreciated when it is rememberedthat there are but three metallic parts to the wrench, including thepivot and the shackle.

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is-

1. The herein described improved pipewrench comprising the frame'orhandle provided with the forwardly and upwardly extending head B, B,terminating in the upper end or nose B"; the shackle D pivotally securedto said frame and swinging upward therefrom, and the strap E made offabric or equivalent non-metallic flexible material and formed with theloop E through which the shackle extends, and adapted to extend aroundthe pipe, up between it and the nose B." and between said nose and therear portion of the under layer of the loop, substantially as described.

2. The herein-describedimproved pipevided with the forwardly andupwardly extending head B, B, terminating in theupper end or nose B; theshackle D pivotaily secured to the frame and extending up therefrom to apoint somewhat higher than said extreme upper end or nose, and thestrapE made of fabric or equivalent non-metallic flexible material andformed with the loop E through which the shackle extends, and

adapted to extend around the pipe, up bem tween it and the nose B andbetween said nose and the rear portion of the under layer of the loop,substantially as set forth.

AMOS WV. VVARNOOK.

\Vitnesses:

HENRY W. WILLIAMS, A. N. BONNEY.

